[calls] application: Consistent use of user_data in action "activate" callbacks.

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 5869296c14356b87dbac759ae59b9583ef702ca5
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Thu Aug 18 02:54:34 2022 +0200

    application: Consistent use of user_data in action "activate" callbacks.

 src/calls-application.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/calls-application.c b/src/calls-application.c
index 302f117c..88f2e9ed 100644
--- a/src/calls-application.c
+++ b/src/calls-application.c
@@ -370,7 +370,7 @@ show_accounts (GSimpleAction *action,
                GVariant      *parameter,
                gpointer       user_data)
 {
-  CallsApplication *app = CALLS_APPLICATION (g_application_get_default ());
+  CallsApplication *app = CALLS_APPLICATION (user_data);
 
   calls_main_window_show_accounts_overview (app->main_window);
 }